c#Socket送受信方法

  /// <summary>
        /// socket 
        /// </summary>
        /// <param name="sendData"> byte[]</param>
        /// <param name="ip"> IP</param>
        /// <param name="port"> </param>
        /// <returns> byte[]</returns>
        public static byte[] SendBySocket(byte[] sendData, string ip, int port)
        {
            byte[] byteReceive = null;
            try
            {               
                IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Parse(ip), port);           
                Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                socket.Connect(IPAddress.Parse(ip), port);
                socket.Send(sendData);
                int count, size = 512;
                byte[] data = new byte[size];
                MemoryStream ms = new MemoryStream();
                while (0 != (count = socket.Receive(data, size, SocketFlags.None)))
                    ms.Write(data, 0, count);
                byteReceive = ms.ToArray();
                ms.Close();
                // 2
                //int bytes = 0;
                //MemoryStream ms = new MemoryStream();
                //while (true)
                //{
                //    byte[] byteMessage = new byte[10];
                //    bytes = socket.Receive(byteMessage, byteMessage.Length, 0);
                //    if (bytes <= 0)
                //        break;
                //    ms.Write(byteMessage, 0, bytes);
                //}
                //byteReceive = ms.ToArray();
                //ms.Close();

                socket.Shutdown(SocketShutdown.Both);
                socket.Close();               
            }
            catch
            {
                return null;
            }
            return byteReceive;
        }

        bool btnstatu = true;  //       
        Socket listener;
        // 
        private void btnStart_Click(object sender, EventArgs e)
        {       
            CancellationTokenSource cts = new CancellationTokenSource();
            Task task = new Task(() => Listen(cts.Token), cts.Token);

            if (btnstatu)
            {
                task.Start();
                statuBar.Text = " ， ";
                btnstatu = false;
                btnStart.Text = " ";
            }
            else
            {
                if (listener != null)
                {
                    listener.Close();
                    listener = null;
                }            
                cts.Cancel();

                statuBar.Text = " ";
                btnstatu = true;
                btnStart.Text = " ";
                statuBar.Text = " ";
            }
        }
        // 
        private void Listen(CancellationToken cts)
        {
            cts.ThrowIfCancellationRequested();
            listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            listener.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
            IPEndPoint iep = new IPEndPoint(IPAddress.Any, ServerConfig.ServerPort);
            try
            {
                listener.Bind(iep);
                listener.Listen(10);
                while (true)
                {
                    Socket accept = listener.Accept();
                    byte[] byteMessage = new byte[1024];
                    accept.Receive(byteMessage);
		    string recvMsg = Encoding.Default.GetString(byteMessage).Replace("\0", "");                   
                    ShowText(DateTime.Now.ToString("[HH:mm:ss]") + accept.RemoteEndPoint.ToString() + " ：" + recvMsg); 
                    string sendMsg = " ";
                    accept.Send(Encoding.Default.GetBytes(sendMsg));
                    accept.Shutdown(SocketShutdown.Both);
                    accept.Close();
                }
            }
            catch 
            {              
            }
        }
        private void ShowText(string msg)
        {
            richTextBox1.SafeCall(() =>
            {
                richTextBox1.AppendText(msg);
                richTextBox1.AppendText(System.Environment.NewLine);
            });
        }